GM Twin Turbo DOHC.
 

Has anyone besides me been following the TT DOHC engine that is already available in the Cadillac XTS for 2014 and CTS in 2016.
The LT5 may be coming back to GM. If they are utilizing a Twin Turbo DOHC 6 cylinder in a current model Cadillac will the future CTS-V and Corvette ZR1 be a TT DOHC 8 Cylinder?

http://media.cadillac.com/media/us/e...win-turbo.html

Re: GM Twin Turbo DOHC.
 

Believe you are right on track!

Re: GM Twin Turbo DOHC.
 

Bob,

Suppose they did this as a hybrid? Electric motors for AWD. BTW, Audi has announced electric turbos. It was just a matter of time.

http://www.autocar.co.uk/car-news/mo...ger-technology

Re: GM Twin Turbo DOHC.
 

No I dont see GM doing a DOHC V8 again, V8's of any type will be a rarity in the future.

Re: GM Twin Turbo DOHC.
 

IMO I don't think GM will ever get rid of the 8 cylinder engine. How many work trucks and vans on the road. And as long as they have to build an 8 cylinder engine for a truck why not add the high horsepower versions for performance cars.

The Mercedes Benz SLS electric is faster than the petro version in a quarter mile. Okay so you can only drive the electric car for 7 minutes than utilize the gas engine to recharge the batteries.

I talked with Graham Behan at BG the LPE supercharged C7 hardware upgrades are supercharger, cam and a fuel pump. The HP has to be North of 700. Graham would not give me a real number as no racer will ever tell you the true HP.

Re: GM Twin Turbo DOHC.
 

Bob,

I think what you'll see is the IC motor being decoupled from the drivetrain. That will migrate to electric drive IMO. As with other technology, it is migrating from hardware to software for controls and modifications.
This is a case of discontinuous innovation that trumps current state technology.
Just a matter of time.

1. All the torque you want NOW!
2. Infinitely variable torque application.
3. Less complex and lighter drivetrain
4. No reduction in power due to atmospheric changes or conditions.

This Race Up Pikes Peak Will Change The Way You See Electric Vehicles - YouTube

Re: GM Twin Turbo DOHC.
 

3. Less complex and lighter drivetrain
4. No reduction in power due to atmospheric changes or conditions.

To me, seeing teams overcome these types of variables are what makes racing exciting and fun...

Between this and driverless cars...might as well buy a slot car set....I know I might be in the minority...but I would rather hear the roar of an engine

Re: GM Twin Turbo DOHC.
 

[QUOTE=cvette98pacecar;208308]IMO I don't think GM will ever get rid of the 8 cylinder engine. How many work trucks and vans on the road. And as long as they have to build an 8 cylinder engine for a truck why not add the high horsepower versions for performance cars.
QUOTE]
That is a possibility. We'll have to wait and see.

There certainly are multitudes of work trucks/vans on the road.

GM will probably reserve V8 engines for the rare performance platforms.


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Some cool videos

Twin Turbo 3.6l Cadillac 420hp@5750 rpm/369lb/ft@ 3500-4500 rpm on the engine tilt table. They sureltest at some extreme angles.
https://www.youtube.com/watch?v=jAuw49TWT80


2014 twin turbo V6 Cadillac on chassis dyno
https://www.youtube.com/watch?v=tLX9sDzWoC8

Animated V6 3.6 engine assembly
https://www.youtube.com/watch?v=8LKB6fBYVaw

Working on cam chains
https://www.youtube.com/watch?v=3USSOvAxGgE

Re: GM Twin Turbo DOHC.
 

No V8 will be directly derived from the twin-turbo cadillac V6 as that block is a narrow 'v' 60 degree v6 and V8's will be at a 90 degree bank angle.

I think a dohc V8 would have to be a clean sheet design and would cost GM plenty. If it isn't in trucks, it won't get the volume they want for economies of scale.

Re: GM Twin Turbo DOHC.
 

A narrow angle V6 would be like my VW R32, 15 degrees (VR6)
One head for both banks.. Hope I never have to replace it...:-D
The Bugatti Veyron W16 is derived from this engine.
Mine's missing 10 cylinders and about 800 horsepower. :(